题目链接:https://www.lydsy.com/JudgeOnline/problem.php?id=4007 Read more
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题目链接：http://codeforces.com/contest/908/problem/E Read more
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题目链接：http://codeforces.com/contest/666/problem/E Read more
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本文整理了《组合数学》中二项式系数的主要内容，包括二项式系数，二项式定理，多项式定理，牛顿二项式定理与常用的组合计数恒等式。 Read more
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题目链接:https://www.lydsy.com/JudgeOnline/problem.php?id=2434 Read more
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